(Reuters) -Blackstone Inc on Monday agreed to buy real estate investment trust (REIT) PS Business Parks for $7.6 billion, including debt, as dealmaking activity in the real estate sector continues to thrive in the aftermath of the COVID-19 pandemic. As part of the take-private deal, Blackstone said its real estate affiliates will pay $187.50 cash to shareholders of PS Business Parks, representing a 12% premium from the stock’s closing price last week. California-headquartered PS Business Parks operates a portfolio of industrial, business parks, office buildings, and multifamily properties loca…